| inept(inadequate, limited, feeble, useless, vain) |
| inessential(adjective, small, insignificant, minor, tiny) |
| innocuous(inferior, inadequate, limited, feeble, useless) |
| insufficient |
| inutile(adjective, poor, base, inferior, insignificant) |
| invalidating(bad, weak, gloomy) |
| itty-bitty(adjective, small) |
| jaundiced(bad, weak, gloomy) |
| junk |
| junky |
| lame(inferior, inadequate, limited, feeble, useless) |
| lesser(adjective, lower, small, inferior, unimportant) |
| lightweight(adjective, unimportant, trivial, minor, senseless) |
| limited(inferior, inadequate, feeble, useless, vain) |
| low-ranking(adjective, slight, lower, value, inferior) |
| mediocre(adjective, poor, base, inferior, insignificant) |
| miniature(adjective, small) |
| minuscule(adjective, slight, small, silly, insignificant) |
| miserable(adjective, lower, poor, base, inferior) |
| miserly(adjective, small) |